This will be an open-label, non-randomized, multiple-center, sequential group, safety, tolerability, and PK study of a single dose of AT1001 (migalastat HCl, GR181413A) administered orally as a 150 mg dose in fasted healthy control male and female subjects with normal renal function compared to mild, moderate, and severe renally-impaired subjects (classified by level of creatinine clearance [CLcr] as determined by the Cockcroft-Gault formula).